Chair.



PATENTED APR. 18, 1905.

J. H. BROWNBLL.

CHAIR.

APPLIOATION FILED AUG. 1, 1904.

2 SHEETS-SHEET 1,

Patented April 18, 1905,

Uiarreo STATES ATENT OFFICE.

JAMES II. BI'IOWNELL, OF CHICAGO, ILLINOIS, ASSlU-NOR OF ONE- FOUhTIIITO KASMUS MIOKELSEN, OF OAK PARK, ILLINOIS.

CHAIR.

SPECIFICATION forming part of Letters Patent No. 787,873, dated April18, 1905.

Application filed August 1, 1904. Serial No. 219.018.

To (11/ 11-71011) it may concern.-

be it known that I. .Lums H. BnowNnLL, a citizen of the United States ofAmerica, residingatl hicago,in the county of Cook and State of Illinois,have invented certainnew and use ful Improvementsin Chairs, of which thefollowing is a specification.

My invention relates to certain new and useful improvements in chairs;and its object is to produce a device of this class which shall havecertain advantages which will appear more fully and at large in thecourse of this specilication.

To this end my invention consists in certain novel features ofconstruction, which are clearly illustrated in the accompanying drawingsand described in this specification.

In the aforesaid drawings, Figure 1 is a side view of a chairembodyingmy preferred construction. Fig. 2 is a front view thereof. Fig. 3 is afragmental perspective view of a back nieceand oneof the brackets whichconnects it to the side piece. Fig. I is a fragmental perspective viewof one of the front corners of the chair, a certain molding-strip andfront piece being removed. Fig. 5 is a plan view of one of the arms,being partly cut away in the line 5 5 of Fig. I. Fig. (3 is a rear view,part of the back and legs being broken away. Fig. 7 isa verticallongitudinal section in the line 7 T of Fig. 2, the back being shown ina different position from that of Fig. I. Fig. 8 isa detail section inthe line s s of Fig. I, and Fig. 9 is a detail section in the line 9 t)of Fig. l.

Referring to the drawings, the seat of the chair will be seen to consistin a rectangular frame A, comprising sides 1/ and front and back pieces113/", respectively. This frame is supported upon legs 1/, and the frontand rear pieces are preferably made removable from the sides. so thatthe chair may be readily taken apart and packed into compact form forshipment or storage. As shown in Fig. st. a bolt u connects the twosides a, nuts being provided upon the ends of the bolt for drawing thesides together upon the front piece 1/". A molding a is secured to thefront iiece If and iro'ects above the same ivin 1 l .I 9 n m a linishedappearance to the chair and to assist in keeping in place the cushionwhich is usually employed in chairs of this class. The molding and frontpiece M are fastened in place by screws a and by corner-pieces a, whichare formed with hollow bosses adapted to cover up the nuts upon the endsof the rod 1/. Said corner-pieces are preferably secured to the moldingand sides a by screws, which when removed leave the molding free forremoval. The rear board If is supported in brackets u, screwed to theinner faces of the sides 1/, said brackets having screw-threzaled studs1/", which extend into the ends of the rear board a, openings a beingprovided in the rear board near its ends, so that nuts may be screwedupon the studs a in connecting the rear board to the sides. In this waya rigid frame is made up which is readily assembled or taken apart.Slats a extend from side to side and are supported by cleats a.

The back is seen at B and is pivoted to the seat A by means of hinges 0.Each of said hinges consists, preferably, of leaves (1 c, Fig. 1, andknuckles (See Fig. 8.) The leaf (1 is secured upon the back andextendsdown in the form of a segment I", and theinnersides of the knuckles c"are elongated in the form of spindles c, which project into the ends ofa roller 0', connecting the two hinges, and upon this roller are woundcoiled springs c, the lower ends of which engage bearing-plates (1*,(see Fig. 7.) secured upon the under sides of the rear board 1/, theupper ends engaging brackets (2, secured upon the inner faces of thesidepieces/) of the back. The side pieces 6 are connected by bars tocomplete the back of the chair.

A strut preferably in the form of a tube 1.) (see Figs. (3 and b) issecured in the side pieces of the bottom and extends between the segments (1. 'Ihrough this tube passes a rod (1, one end of which is formedwith a head (I, engaging one of the segments. The other end isscrewthreadcd to receive a clamping nut 17". By tightening up this nutthe back may be held at any inclination to the seat, as is desired.

The arms of the chair I) are pivoted to the back at a at one end andtheir other ends are pivoted to links a at 0 which links are pivoted tothe seat by means of hinges E. The hinges E are secured to the sides aof the seat by screws 6 as is clearly indicated in Fig. 9. The pivotalconnection between the arms and seat is such that any movement of thearms with respect to the seat is always approximately parallel thereto.In this way when the back is tilted back by the person sitting in thechair the arms move down with the back, so that in all positions of thelatter they are at a suitable height with respect to the seat to afforda comfortable resting-place for the arms of the person sitting in thechair.

The tension of the springs c is preferably not only'sufticient to holdthe back upright, but also to support a person reclining in the chair inany comfortable position without the necessity of tightening up the nut(Z I realize that considerable variation is possible in the details ofthis construction without departing from the spirit of the invention,and I do not intend tolimit myself to the specific details herein shownand described.

I claim as new and desire to secure by Letters Patent 1. In a chair, thecombination with a rigid bottom frame and legs, of a back hinged to thebottom frame, a pair of arms hinged to the back at one end, a pair ofuprights hinged to the other ends of said arms and l'iinged to thebottom frame, hinges between the back and bottom frame, one of theleaves of which contains a curved slot concentric with the pivotal axisand the other of which is provided with an inwardly-extending spindle, aroller supported between the spindlesof the two I hinges, a springcoiled upon the roller and tending to crowd the back forward and aclamping-rod secured in the bottom frameand provided at its ends withmeans bearing upon the slotted portion of the hinges to clamp the backagainst pivotal movement upon the axis of the latter.

2. In a chair, the combination with a rigid bottom frame, of a backhinged thereto by means of hinges comprising the leaves, 0, 0', one ofwhich is provided with a curved slot concentric with the pivotal axis,and the other of which is provided with an inwardly-extending spindle, aroller supported between the spindles of the two hinges, a springsupported upon the roller and tending to crowd the back forward, and aclamping-rod secured in the bottom frame and provided at its ends withmeans bearing upon the slotted portion of the hinges to clamp the backagainst pivotal movement upon the axis of the latter.

3. In a knockdown chair, a rigid bottom frame made up of side piecesprovided with legs, a removable front piece, a cross-bolt clamping theside pieces to the front piece and having nuts upon the outsides of theside pieces, a molding secured between the side pieces in front of saidbolts, corner-pieces having hollow bosses covering said nuts, socketssecured to the sides of the rear portions of the side pieces,screw-threaded studs upon said sockets, a rear cross-bar between saidsockets containing perforations for said studs and openings adjacent tothe ends thereof and nuts upon the ends of said studs within saidopenings clamping the rear cross-bars to the sockets.

4:. In achair of the classdescribed, the combination with a rigid bottomframe and back, of hinges between the bottom frame and back, comprisingthe leaves, 0, 0, one of which bears the slotted segment, 0*, a tubularstrut, D, secured in the side pieces, a rod extending through said strutand through the slots in the segment, 0*, and means for tightening saidrod upon the segments and the strut to clamp the back against pivotalmovement upon the hinges.

In witness whereof I have signed the above application for LettersPatent at Chicago, in the county of Cook and State of Illinois, this12th day of July, A. D. 190 i.

J AMES H. BROWN ELL.

WVitnesses:

CHAS. O. SHERVEY, H. BITNER.

